UNSC Pillar of Autumn (C-709) was a Halcyon-class light cruiser in the UNSC Navy. It was informally referred to as the Autumn, and its name abbreviated to PoA.. Prior to the Fall of Reach, Pillar of Autumn was selected to support Operation: RED FLAG, a SPARTAN-II operation to capture Covenant leaders.
Start from a low level of net carbs to ensure you quickly enter ketosis (~ 20 grams of net carbs per day). When you detect ketosis after about 2-3 days, start adding net carbs (about 5 grams each week) until you detect a very low-level or no ketones (using Ketostix or blood ketone meter).
The conventional wisdom has been that low carb means getting most energy from fat, to the extent that the body is permanently in ketosis. Stored fat is being metabolised and used for energy and ketones are being produced. To stay in dietary ketosis, you need to eat 50 or less grams of carbohydrate a day.